Carbureter.



PATENTED SEPT. 8, 1908.

2 SHEBTSv-SHEET 1.

torney PATENTED SEPT. 8, 1908.

F. H. HEITGER. CARBURETER. APPLIoATIoN FILED MAR.s1,19oe.

2 SHEETS-SHEET 2 lUtn esses '25 beingto provide a c rbureter whose produet,

srnirns PATENT OFFICE,

FRANK H. HEITGER, OF INDIANAPOLIS, INDIANA, ASSIGNOR TO SPEED CHANGING PULLEY COMPANY, OF INDIANAPOLIS, INDIANA, A CORPORATION OF INDIANA.

GARBURETER.

speincatiou of Letters Patent.

Patented Sept. 8,l 1908.

application alsa Starch s1, 190s. Serin Nb. 309,195.

Toull whom 'it may concern:

Be it known that L FRANK H. HEI-Tenn,- a eitizen of the United States, and a resident of Indianapolis, Marion county, Indiana, have invented' a certain new, useful, and Improved Carbureter, of which the following is a full, clear, and exact desoription,such as will, en'- ableothers skilled in the art to which it appertains to make and use the same.

' My invention-relates to improvements in apparatus for carburetin air for internal combustion engines, and as special reference to improvementsincarbureters of that class in Whlch the li 'uid vhydro-carbon, to be vaporized, isgheld in ulk in-a reservoirwhioh forms part ofthe carbureter, the liquid being drawn into a mixing chamber, alsoformingpart of theoarbureter, through a nozzle leadlngiilrom said-reservoir.

e object of my i earlureterl which shall be so constructed as to-produce an explosive mixture-from gasolene, or'the like, and air, ofconstantand-invavriable quality atall times following its adjust-4 ment,- tlie special purpose ofthe Iinvention as to the qualityof he mixture, shall be rndependent of and not altered by changes or other consumer.

`variations in the demand of the engine-or vide a earbureter of simple and economical construfotion;l

Still another object ,of .theinvention-is the `provision of a oaibureter 'which shallbe capableof all4 necessary adjustment, andi-Whioh may be taken apart and then re-assemb'led wit out change in the relations of the adjustable parts.

lnvention consists in al carbureter of the 'oonstruotionandcombination of arts hereinafter described and-particularly polnted outin the claims.

The invention will be more'readily understood by reference to the accompanying drawings, forming. a part ofI this specification, and in which Figure 1- 1s a vertical 'section of]v carbur'eter embodying my invention; Fig; 2 is an enlarged detail view of thevaporizernozz'le; is a sectional-view illustrating' a modi-l' fred forzrnol my invention; Fi 4 is fa sectional detail14 showingA rthe .air va ve inmodiiied folj'myand Figs. 5 and 6 are sectionaldetails of other formsof vaporizing tubes.

with a large airinlet opening, 15. Walls, 8', of the Chamber, .8, are preferably nvention is, te provide a As shown in the drawings, the body of my carbureter contains two liquid reservoirs, 2 and 3, connected by a duct, 4. A float, 5, is arranged in the reservoir, 2, for operating the liquid supply valve, 6, in the supply duct, 7. Between t e two reservoirs is the, mixing chamber', 8', whereof l9 is a top extension, closed by a'cap, 10. The part, 9, contains the outlet opening, 11,- for which, 12,- is the throttle valve. The stem,13, of the throt- .t-le valve, is journaled in thecap, 10, and to it I'attach the throttle lever, 14: ltwill be obL served that the bottom of thechamber, 8, is elevated above the duct, 4, and-is rovided he lowerculved,a s shown;l to co-act with the air valve,

y16, the urposefof this construction being to gradual y increase the actual valve opening 1n proportion to' the elevation'of the valve as 5 itis raised from its seat', `The weight of the valve resists the opening thereof by pressure of air frolnbeneat sistance to the entra-noe of the air ma vbe ad'-v but in' order that this e= justed 'or regulatedl nicely, I refer-a ly ern- :ploy a spring, V17, which ten s tolro'ld the 'va'lve on itsseat. Thisvsprin e ma be arjranged onta stem',-18,4 depen Tomthe duct,- 4,and is connectedv with thevalve by a v Slight Wiresyoke, 19,'havin'gl hooked ends, that A further object of the invention is to proaresnappedinto a groove,' 16 in the' valve,-

or tubular passage,- 16, whiehfconstitutes a part of the vapor tube that opensuinto the mixing chamber abovethe valve; Thistube',

l 16. The'piessure 'of' the spring maybe ads v justedby means of the nu-t,:20, on the stem, 118.' The-valve, 16, containsa central bore 21, is preferably forrnedupon or attached to theV swingingthrottle valve,=-12; and it `se'ies as a guide for'theval-ve, 16; Ata point beneath the outlet 'openin 11 the tubehas a' large lnumber osrallho es,21. Theliquid nozzle, 22, projects upward from the duct, 4;

wherefrom ltis supplied with liquid, and the upperlend ofthe tube terminates Withinthe perforated portion of the va or tube, 21. It iscustomary to provide suc nozzles Witha "single-jet opening, but-I find that this isobjectionable as'it Ynecessitates the breaking up' of a' eomparatively', strong stream of-liquid in some manner andthereby delays the moment otstliefabsbrptionlofthe liquidb thep'assing aircurrents., In lieu thereoi Iy upper 'endvof the tube or nozzle, 2 2-,f-witl1' 'two" or 1more longitudinal saw-cuts -or ne slits,

22. These deliver the liquid into the vapor tube in the formof very thin, flat streams or sprays. By this expedient I avoid the objections to the ordinary nozzles, being thus able to deliver the liquid in such a minutely subdivided'sta'te that it is practically a iine s ray or vapor, which is quickly carried tiirough the perforations into the mixing chamber by the small-'bedy of air moving through the vapor tube' whenever there is a partial'vacuum in the large ciittnber....,;flfheu narrow slits in the nozzle lend themselves' readily to adjustment, ar slight reduction or increase in their length having a perceptible effect in the carburiza tion of the air exhausted from the mixing chamber. The adjusting .device which I employ comprises a small vcylinder or cap, 23, on the u per end 'of the tube, the same being operate by a stem, 24, slidable in the reduced upper part of the member, 21, and threaded in the hub or stem of the throttle valve. A nne thread is used on the stem, 24, and the nicest possible adjustment may be made by turning the stem to raise or lower the cap, 23. A locking nut, 24, at the upper' end of the stem, 24, serves to fasten it after it is adjusted.

The operation of my carbureter is as follows: The'iioat valve operates t0 maintain formed in. the va or tube.

the liquid in the reservoir at a level slightly below the slits in the nozzle. The carbureter is lconnected with the inlet valve or chest of the engine, and the partial vacuum created in the mixing chamber upon the suction'stroke of the engine elevates the liquid in the nozzle so that the sprays described are The consequent heavy mixture o vapor and air leaves the tubek through the 'perforations, 21'; meantime, the air-valve, 16, will have been lifted from its seat a distance proportional to the suction of the engine, and the strong currents of air which pass upward toward the outlet, 11, absorb the vapor as rapidly as it is supplied by the tube. The ultimate mixture is determined and re ulated by adjusting the spring and-the n ozz e cap to such points as to accurately limit the liquid and the air to the exact quantities required.

It' Will be obvious thatv numerous modifications of my invention Will readily suggest themselves to one skilled in the art and I therefore do not confine the invention to the specific constructions above described. Among the modifications of structure which may be made are those illustrated in Figs. 3 to 6. In Fig. 3 I have shown a throttle valve in the form of a plug, 12, in the upper art of the mixing chamber, and provided Wit an inwardly extending arm, 12b, which supports the vapor tube, 21a. In this instancethe vapor tube is provided with a plurality of slots, 2lb, and the arm, 12b has an inverted cone within the tube to break up the single jet of liquid provided by the nozzle here shown.

seasei 5. Fig. 6 diiiers from Fig. '3 in the substi-tution of round perforations for the slots, 21". Fig. 4 illustrates a structure like unto Fig. 3, but in which the perforated top of the vapor tube is domed. Itis obvious thatthe adjustable nozzle of Fig.' 1 maybe substituted for the nozzles illustrated in Figs. 3 to 6, The air valve of Fig. 4 is regulable and if desired, may be substituted for the valve shown in Fig. 1. In this case the spring, 17h, is arranged within the valve and is adjusted by means of a threaded sleeve, 160.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. In a device ofthe class described, a mix- -ing chamber having an air inlet opening at the bottom and an outlet at the top, incombination with a liquid reservoir adjacent to said chamber and having a duct extending beneath the o ening in the latter, a nozzle rising into said) chamber from: said duct, an air valve concentric `with 'said nozzle for regulating the admission of air at the inlet opening, and a vapor tube within said l"chamber and forming a4 guide for saidvalve, substantially as described.

`2. In a device of the class described, avmixing chamber having an air inlet opening at the bottom and an outlet at the top, in combination with a' tubular air valve within said chamber to close said inlet opening, a va or tube Within said chamber whereby said va ve is guided, means within said chamber supporting said tube, and a liquid nozzle rising through said valve and Within said tube, subvstantially as described.

3. In a device ofthe class described, a mixing chamber having an air inlet at the bottom and an outlet at the top, in combination with a vapor tube hung Within said chamber and having perforations below said outlet,

and a spring-pressed air valve guided by said tube, substantially as described.'

4. In a device of the class described, a mixing chamber having an inletV at the bottom and an outlet at the top, in combination With a throttle valve arranged in the upper art of said chamber and havinga stem or hu concentric therewith, means for operating said valve, a vapor tube concentric with the inlet opening an supported by said throttle valve, a nozzle within said tube, and an air admis: sion valve guided by said tube, substantially as described.

5. In a device of the class described, a mixing chamber having an inlet at the bottom and an outlet at the top, in combination with a suitable liquid reservoir, a iioat valve in the latter, an adjustable air valve at the inlet of said chamber'for automatically controlling the admission of air thereto, a nozzle con- -nected with said reservoir and rising centrally within said valve, said nozzle having a plurality of narrow slits at its upper end, and a vertlcally adjustable cap on said upper end for varying the length of said slits, substantially'as described.

6. A nozzle for carbureters com rising a nozzle pro er having a plurality of s 'ts in its upper en in combination with a closely littmgcap on said upper end, and means for .adjusting the same vertically thereon, substantially as described. I

7. ln a'device of the class described a mixing chamber, having an inlet at the bottom and an outlet at the to in combination with an intermediately pe orated vapor tube depending from the top of said chamber, a ver- 1 tically adjustable stem in said tube, a cap vor vcylinder u on the lower-end of said 'stem adjacent to t e erforations in said tube, a'nozzle rising Wit 'n lsaid chamber and having a slitted upper end within vsaid cap, and an automatic air valve guided on `the lower end of said tube, for controllin the admission of air at said inlet, substantia y as described.

^ 8. In a device of the class described, a mixing chamber having curved lower walls and provided with an air inlet in its bottom and an outlet in its top, in coqmbination with a liquid nozzle rising Within said chamber, a vapor tube surrounding the same, and an air valve seated at said inlet and vertically movable on said tube, substantially as described.

9. ln a device ofthe class described, a miX- ing chamber, having an inlet at the bottom,

an inwardly. opening air valve for closing said inletl and provided with a central duct or passage, a li uid nozzle rising through said passage, a' yo edepending from said valve, and a spring engaged therewith, substantially as described.

10. In a device of the class described, a mixing chamber having an air inlet opening at the bottom and an outlet at the top, in combination with a liquid reservoir adjacent to -said chamber and having a duct extending beneath the o ening in the latter, a nozzle rising into sai chamber from said duct, an air valve concentric with said nozzle for regulating the admission of air to the inlet opening, and a tubular member within said chamber, said tubular member forming a guide for said air valve, and together with the bore of said valve forming a vapor tube; substantially as l described.

In testimony whereof, I have hereunto set my hand, in the presence of two subscribing Witnesses, this 17 day of March, 1906.

I FRANK H. HEITGER.

` Witnesses v CHARLES GILBERT HAWLRY, CHAs. -T. MURRAY. 

